So this hand happened on a final table me being 2nd in chips VS the chipleader.

I defend 89o vs btn ->flop 7s 4d Ts i call half pot ->turn Jd he bets 70% i have 31bb and the pot is now 17bb. A shove would give him 34% to call.
Do we shove to protect from draws because its a final table big stack vs big stack?

Also, would it be a ICM punt to shove turn with something like 56?